Re: [Freesurfer] Demeaning covariates correctly?

2018-03-06 Thread Douglas N. Greve
Yes, you have done everything correctly. QDEC takes your table.dat file and creates an FSGD file. It is possible to specify in the FSGD file whether to do demeaning or not by including a keyword. It does not find that keyword and so does not do demeaning. But you've already done demeaning so it

[Freesurfer] Demeaning covariates correctly?

2018-03-06 Thread Avideh Gharehgazlou
Hi experts, I'm using QDEC to look at between group differences in LGI. According to a previous post I demeaned my covariates (age and surface area) inputted in my qdec.table.dat file by subtracting each value (i.e. each age) by the mean of all participant's ages and dividing it by the standard